Ore-grinding machine.



C- O. IVHCHAELSEN. ORE GRINDING MACHINE.

APPLICATION FILED SEPT. a. 1912.

Patented Oct. 26, 1915.

3 SHEETS-SHEET 1.

Charles Ma haelsemiwue/wtoa.

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C. 0. MICHAELSEN.

ORE GRINDING MACHINE,

APPLICATION man SEPT. 3. m2.

Patented Oct. 26, 1915.

3 SHEETS-SHEET 2.

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ORE .GRINDING MACHINE.

APPLICATION FILED SEPT. 3. I912.

Patented oat. 26, 1915,

3'SHEETSSHEET 3.

cHARLEso MrcHAELsnN, or OMAHA, NEBRASKA.

ORE-GRINDING MACHINE.

To all whom it may concern:

Be it known that I, CHARLES 0. MICHAEL- SEN, a citizen of the United States, and a resident of Omaha, in the county of Douglas and State of Nebraska, have invented certain new and useful Improvements in Ore-Grinding Machines, of which the following is a specification. 7

My invention relates to machines for grinding, crushing and pulverizing hard or soft ores, silica, cement-clinker, gypsum,

talc, shale, carbon, or the like, or any refractory material consisting of comparatively small pieces, or which has previously been broken into relatively small pieces from larger masses. v p

It is the object of my invention to provide a machine of large capacity, for rapidly and economically crushing, grinding and pulverizing materials of the class described; employing the flat surfaces of two plates arranged adjacentto each other; and producing by means of sultable mechanism an os cillating movement of the plates such that in a cycle of oscillation the plates alternately slide past each other in opposite directions, changing this direction for each semi-oscillation; and during the oscillation the distance between the plates increasing from the minimumdistance to the maximum distance to which the mechanlsm 1s ad usted, then decreasing to the minimum dis-- tance again; thus combining the two actions, of which the first may be designated :Speeification of LettersPatent.

Application filed September 3, 1912.

as abrasive or rubbing, and the latter as crushing, in an eflicient machine for the purposes set forth.

A machine embodying my invention is illustrated in the accompanying drawings, in which Figure 1 is a side elevation of the machine,

Fig. 2 is a vertical longitudinal sectional view taken on the plane of the line y of Fig. 3, Fig. 3 is a vertical transverse sectional view taken on the plane of the line w-m of Fig; 2, and Fig' 4 is a detail hori- Zontal sectional view taken on the plane of the lines 2'@ of Figs. 2 and 3. t

1 v In the construction of the machine shown I provide thefside-frames ljwhich'are. connected to each other by asuitable end-block eccentricslide 12.

centric-slide, as shown.-

Patented U013. 26', 1915.

Serial No. 718,413.

journaled in suitable bearings formed in the beltto a suitable source of power.

A rocking or oscillating beam 5 is mounted on a shaft 10 which is journaled in bearings located at about the center of the sideframes and formed by bushings 23 removably secured in the side-frames by screws passed through the end-flanges of the bushings, as shown. Themechanism for actuating the beam 5 is of'the general construction shown in U. S. Letters Patent No. 994,023, issued to me May 30, 1911. The beam-actuating levers 6 and 7 are mounted on transverse shafts 8 and 9 which are iournaled in the side-frames behind the bee r ngs for the shaft 10, and slightly above and below the same, respectively. The rearwurdly extending arms of the levers 6 and 7 terminate above and below the shaft 3, and said shaft carries between the side-frames an eccentric 11, around which is disposedthe Bearing-rollers 13 are arranged between theeccentric and the ec- The forward end of the eccentric-slide is forked and passes slidably over a block 14 which is tiltably mounted on a transverse shaft 15. Segmerit-blocks 16 are disposed in cylindrical transverse recesses in the rearward ends of the levers 6 and 7 and said segment-blocks regulated by the-adjusting-nuts shown. In

and are mounted on a, suitableba 'e, Such as the arms of the levers 61 and 7 adjacent to the upper and lower ends of the beam 5 are transversecylindrical recesses in which are disposed. the segment-blocks 20. On the flat sides of said segment-blocks are secured the facing-plates 21 which normally engage plates secured in recesses in the rear-ward face of the beam 5. Itwill be obvious that rotation o fthe shaft 3 will pros duce an oscillating movement of the beam V faces of the beams.

5, and that wear of the sliding surfaces of the actuatin mechanism may be compensated by ad ustment of the wedge-shaped facing-plates 17 on the segment-blocks 16.

A beam 24 of a form similar to the beam is mounted on a transverse shaft 25 which is journaled in bearings formed by bushings 26 removably secured in boxes '27 by screws passed through the end-flanges of the bushings.- The boxes 27 are longitudinallyadjustable in guideways formed in the front ends of the side-frames. The outer sides of the boxes have slotted flanges through which screws 28 are passed and threaded into the frame. The pressure of the shaft 25 upon the boxes longitudinally of the sideframes is received by the end-thrust adjusting-screws 29. which pass through the endblock of the frame and engage the ends of the boxes, as shown.

The upper ends of the beams 5 and 24 are connected to each other by means of a pitman 30,- and the lower ends of said beams are connected by means of a similar pitman 31. The ends of the pitmen are pivotally connected with slotted rectangular blocks 32 and 33, said-blocks fitting loosely in recesses made therefor in the upper and lower ends of the respective beams 5 and 24. Suitable slots, for the passage of the pitmen, extend from the said recesses to the adjacent The pivot-blocks 32 and33 are retained within the recesses by means of plates 34 and 35 removably secured upon the ends of the respective beams. The thrust of the pitmen transmitted from the beam 5 to the blocks 33 is received by adjusting-screws 36 which extend through the front side ofthe beam 24, entering the re cesses. for the pivot-blocks and engaging them, as shown. The adjacent faces of the beams 5 and 24 are similarly formed and have removably secured thereon the grind ing-plates 37. Said plates are of like form and are interchangeable, having on their backs at the lower. ends projecting lips which fit into corresponding transverse channels in the beams, and their upper ends fitting into shouldered portions of the beams and being secured thereto by means of cylindrical keys 38,as shown. When the beams are in approximately vertical positions the plates present to each other opposed plane surfaces which along their lower edges are spaced apart according to the size of the product desired as a result of the grinding operation. From their lower edges the said sur- I faces diverge slightly. so that a narrow provided with transversely extending teeth wedgeshaped space is formed between them. Near the upper ends of the plates the op- I, posed surfaces diverge at a greater angle so as to form between them a throat for receiving the material .to be operated upon. The

said portions of the plates are preferably of which the lower sides are approximately horlzontal and the upper s1des are inclined upwardly. The space between the grinding plates may be varied to regulate the size of the product, or to compensate for the wear of the opposed faces of the plates, by adjusting the positions of the boxes 27 in the side-frames, by means of the screws 28, and at the same time adjusting the positions of the pitman pivot-blocks 33 in the beam 24, by means of the screws 36. By varying the position of either of the pivot-blocks without changing the other to correspond with it, the angle of divergence between the opposed faces of the grinding-plates may be altered.

To the side-frames 1 adjoining the sides of the beams 5 and 24 are secured the sideplates 39 of a hopper which is completed by the diverging end-plates 40 and 41. The end-plate 41 is secured to the side-plates by screws which pass through slots therein so that the position of said plate 41 may be adjusted longitudinally of the machine. The plates 40 and 41 are provided with renewable lining-plates 42 of suitable material such as steel, said. lining-plates extending down to the top of the throat formed between the serrated portions of the grinding-plates.

The sides of the throat are similarly lined 3 with plates 43, as shown in Fig. 3.

In order to facilitate the feeding of materials from the hopper into the throat between the grinding-plates, and to prevent packing of the materials in the lower part of the hopper, I provide within the hopper a vertically movable tamping or feeding plate 44. Said plate preferably has laterally extending lugs 45 formed thereon and is carried by a rod 46 which passes between the transverse guiderods 47 and is connected at its upper end with the forward end of the lever 48. Said lever is fnlcrumed on the hopper end-plate 40, as shown, and extends rearwardly to a point above the rearward end of the lever 6. The rearward ends of the levers 6 and 48 are connected by means of a rod 49 of which the length is variable by means of the turnbuckle 50. hlovement of the lever 6 causes an oscillating movement of the lever 48 which, in turn, imparts a vertical reciprocating movement to the rod 46 and the tamping-plate 44. During the upward movement of the tamping-plate the lugs 45 agitate and loosen the material in the lower part of the hopper, and during the downward movement of the plate the lugs and the thickened lower edge of the plate tend to force the material down into the throat between the grinding-plates.

Referring now to the action of the grinding-plates upon the materials passing between them, it will be noted that the oscillating movement of the beam 5 produces a like movement of the beam 24:, the arrangement being such that the pitmen 30 and 31 lelogram of which the sides are pivotally connected at the corners, so that while the opposite sides remainparallel to each other the angles of the adjacent sides may vary each way from a right angle. Keepingthis conception in view, it will be apparent that the distance between the beams and between the working faces of the grinding-plates, measured perpendicularly to the faces, will be greatest when the beams are in vertical position, or when the conceived parallelogram is rectangular. It will be apparent, as a corollary to the above, that movement of the beams in either direction from the vertical will cause the distance between the working faces of the plates to decrease, and, as a relatively large movement of the beams is required to produce a relatively small reduction of the space between the plates, it will be seen that an exceedingly powerful crushing action will result upon any material between the plates. In addition to the crushing action resulting from the alternate movement of the plates toward and away from each other, there is a further action tending to reduce or pulverize the material. This action is of a rubbing or abrasive nature and results from the faces of the grind ing-plates being on relatively opposite sides of the axes of rotation of the beams, whereby the opposed faces of the plates slide past each other in opposite directions during each movement of the beams, and the direction of said sliding movement is reversed as the movement of the beams is reversed. As a further result of the said sliding or rubbing movement of the grinding-plates relatively to each other, there is a tendency for the transverse teeth on the upper parts of the plates to carry materials from the throat down between the plates, and thus maintain a constant supply of material to replace that which is discharged at the bottom after it has been reduced to particles small enough to pass between the lower edges of the grinding-plates.

Now, having described my invention, what I claim and desire to secure by Letters Patent is:

1. In a machine of the class described, a pair of horizontal parallel shafts mounted to oscillate about fixed axes, a pair of beams mounted on said shafts so that the central body-portions of the beams lie between the shafts, means pivotally connecting the adjacent upper and lower portions of the beams to each other, and actuating means engaging each end. of one of the beams to oscillate the same about the axis of the respective shaft upon which it is mounted.

2. In a machine of the class described, a pair of beams arranged substantially vertically and parallel to each other, means for pivotally supporting each beam on a fixed axis passing through the central part thereof, means pivotally connecting the adjacent upper and lower ends of the beams to each other, grinding-plates secured on the adjacent faces-of the beams, said grinding-plates having adjacent plane-surfaced portions diverging slightly from each other, and actuating means for simultaneously oscillating the beams about their fixed axes in like directions and in equal amounts.

3. In a machine of the class described, a pair of beams arranged parallel to each other and in substantially vertical position, links pivotally connecting the adjacent ends of the beams to each other, means forming fixed axes passing through the central portions of the beams, grinding-plates secured on the adjacent faces of the beams, and actuating means for oscillating the beams about their axes.

4:. In a machine of the class described, a pair of beams and connecting links forming a parallelogrammatic couple, the beams ex tending approximately vertically, means forming fixed axes passing through the central parts of the beams, grinding-plates secured on the adjacent sides of the beams, the grinding-plates having diverging adjacent faces, and means for oscillating the beams upon said fixed axes, whereby the adjacent faces of the grinding-plates are moved toward and away from each other and also move longitudinally in opposite and alternating directions.

5. In a machine of the class described, a pair of vertically extending beams pivoted on horizontal parallel fixed axes passing through the central parts of the respective beams, means for oscillating one of the beams upon its axis, and means pivotally connecting each end of said beam with the adjacent ends of the other beam, whereby said adjacent ends of the beams will oscillate simultaneously in like directions and the adjacent sides of the beams approach each other as the beams move from a vertical to an inclined position.

6. In a machine of the class described, a pair of vertically extending beams pivoted on horizontal parallel fixed axes passing through the central parts of the respective beams, grinding-plates secured on the adjacent faces of the beams, said plates having opposed plane-surfaced portions and means for directing material between said portions, actuating means engaging one of the beams at each side of its axis for oscillating the same upon said axis, and means pivotally connecting the adjacent upper and In testimony whereof I have hereunto lower ends of the beams to each other,

subscribed my name in the presence of two 10 whereby the opposed faces of the grinding: Witnesses.

plates Will be moved past each other in opposite and alternating directions and alter- CHARLES MIGHAELSEN' nately approach and recede from each other Witnesses:

as the beams move from vertical to inclined D, O. BARNELL,

and from inclined to vertical positions. M. S. WALKER.

Copies of this patent may he obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

